Acquia

Acquia is a commercial open source software company providing products, services, and technical support for the open source Drupal social publishing system. Drupal is a free, open-source web development platform for online content and user communities. Drupal powers some of the busiest sites on the web, and can be adapted to virtually any visual design. Drupal runs over a million sites, including WhiteHouse.gov, World Economic Forum, Stanford University, and Examiner.com.